“…However, a phosphinate complex, (μ-H) 2 Os 3 -(CO) 10 (μ,η 2 -O 2 PPh 2 ), is known (Figure 104). 236 12. GROUP 9 PHOSPHONATES The nuclearity of homonuclear cobalt phosphonates varies from 1 to 20, 237 while in the heterometallic systems the highest nuclearity achieved is 24.…”